Dough-mixer.



R. ROBINSON. DOUGH MIXER.

PATENTED JAN; 6, 1903.

APPLICATION FILED JUNE 19, 1902.

N0 MODEL.

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llNiTED STATES PATENT OFFICE.

RICHARD ROBINSON, OF MOBILE, ALABAMA.

DOUGH-MIXER.

SPECIFICATION forming part of Letters Patent No. 717,929, dated January6, 190

Application filed June 19, 1902.

To all whom it'may concern.-

Be it kn own that I, RICHARD RoBINsornresiding at Mobile, in the countyof Mobile and State of Alabama, have invented certain new and usefulImprovements in Dough-Mixers, of which the following is a specification.

My present invention relates to improvements in the type of dough-mixerdisclosed,

in my Patent No. 636,559, dated November 7, 1899, and which seeks toprovide certain modifications and changes in the structural combinationof parts set out in the said patent referred to whereby the cost ofmanufacturing will be materially decreased, the eificiency of the mixerincreased, its operation simplified and rendered more convenient, andwhereby the several parts can be the more readily assembled for use orseparated for cleansing.

In its generic nature my present invention consists in a novelcorrelative arrangement of the paddles or whirl-frames and operatingmeans therefor; and in its more subordinate nature it consists incertain details of construction and peculiar combination of partshereinafter described and claimed, reference being had to theaccompanying drawings, in which Figure 1 is a vertical section of adoughmixer embodying my invention. Fig. 2 is a top plan view thereof.Fig. 3 is a side view illustrating the general arrangement of thepaddles or whirl-frames and the drive-gear therefor, the lower ordirect-driven paddle or whirl-frame being shown detached from itsdriving-spindle. Fig. "4 is a detail view of the bridge orsupporting-frame. Fig. 5 is a detail view of the bridge-clamping devicehereinafter referred to.

In my present construction of dough-mixer the pan 1 may be of anyapproved form, preferably that shown in the drawings, and provided witha socket in its bottom to form a stepped bearing 1 for the lower end ofthe operating shaft or spindle 3, the upper end of which is supported inthe arch 4 of a bridge-bar 4, in practice of a length sufliicient toextend over a large-sized pan,and to provide for securely and detachablyholding the said bridge-bar on the pan edge I use a clamp member foreach end of the bridge-bar, the construction of which is best shown inFig. 5, from which it will be noticed the same comprises a curvedclamping portion 5*, adapted to project under the bead or edge l of thepan, and an outwardly and upwardly extendin}; finger 5 at each end,which fingers terminate in head portions 5, that project toward eachother and in a parallel plane with the curved portion 5*. Each headportion is provided with a threaded aperture to receive a clamp-screw 5and the said screws are arranged to engage the ends of the bridge-bar 4,as clearly shown in the drawings. By providing clamp devices of thecharacter stated the same can be conveniently made fast to a pan edgeand to secure the bridge ends and readily permit of the removal of thebridge-bar, the construction of said clamps being such that they can bereadily used on difierent sizes of pans.-

One end of the bridge-bar 4 carries on its upper face bearin gs 4 4 toreceive the crankshaft 8, the outer end of which carries acrankhandle 8and its inner end a removably-held pinion 9, adapted to mesh with thepinion 10, made fast to the drive-shaft 3, and a pinion 11 on a hub 11,loosely rotatable on the shaft 3 in the direction of the motion impartedto the shaft 3 by the pinion 9, and the said pinion and hub 11 and 11are supported in a supplemental bearing 12, pendent from the bridge 4,to which it is firmly secured, and the said bearing 12 includes a hingedcap portion 12, whereby by properly adjusting the cap the shaft 3 can beremoved or applied for use as desired, provision being also providedthereby for sustaining the hub 11*, that carries the pinion 11.

In my present invention instead of providing an inner and an outerwhirling frame, as in my patent referred to, I use an upper and a lowerwhirling frame. The upper frame comprises a hub 13, loosely mounted onthe shaft 3, and a series of radially-projecting paddles 13 which taperfrom the hub to the tip end. The lower whirl-frame comprises a hub 14and a series of radial paddles 14:, and the said frame carries aclamp-screw let for holding said hub fast on the lower end of the shaft3 to terminate therewith. The upper whirl-frame hub 13 has a pair ofdiametric oppositely-projecting screw-studs 13", each of which has aclamping-shoulder 13, and the hub 11, having the pinion 11, has

similar studs 11", having shoulders 11 and the two hubs 11 and 14 areconnected by the flexible members, preferably spring-wires 16 16, theupper ends of which are clamped against the hub 11 by the shoulders 11of the studs, and the lower ends are made fast to the hub 13 by theshoulder-studs 13 and to cause the two hubs 13 and 11 to turn in thesame direction, and yet give the upper whirl-frame a limited movementboth vertical and rotatable independent of the hub 11 the wires 16 arecrossed, as shown, and by reason of the flexibility of the saidconnection sudden jars on the upper whirl-frame by quick movement of thehub 11 in either direction and the danger of breaking the paddies ofsaid upper whirl-frame are thereby overcome. Furthermore, said flexibleconnection also allows for a limited vertical motion to the upperWhirl-frame relatively to the lower'whirl-frame, which travels in thefixed horizontal plane.

From the foregoing description, taken in connection with theaccompanying drawings, it is thought that the advantages and manner ofoperation of my invention will be readily understood. By turning theoperating-handle the gear mechanism will impart a direct motion to theshaft 3 in one direction and the reverse motion to the hub 11 and theupper whirl-frame will be rotated in an opposite direction to therotation of the lower whirl-frame, which rotates with the shaft 3, andby reason of the peculiar connection of the upper whirling frame withits driving power a sufficient flexibility between the two is alwaysmaintained to prevent sudden jar on the paddles.

The several parts can be quickly assembled or separated, theircorrelative arrangement being such that any ordinary kitchen help canput them together for use.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

l. A dough-mixer, comprising a supporting-frame adapted to be detachablyheld on the rim of a pan, a vertically-mounted operating-shaft, anddriver means therefor cooperatively mounted on the supporting-frame,said driver means including a hub loosely mounted on the operating-shaftand rotatable in a direction reverse t0 the movement of said shaft, alower whirl-frame mounted on the operating-shaft to turn therewith,asecond whirl-frame loosely mounted on the operating-shaft, and flexibleconnections joining the loosely mounted whirl frame and theloosely-mounted hub, all being arranged substantially as shown anddescribed.

2. In a mixer as described, a supportingframe for sustaining the mixingdevices in a pan, a vertically-mounted rotary shaft, a whirl-framerotatable therewith, a second whirl-frame for loose vertical androtatable action on the shaft, a driving means including a direct gearconnection with the operatingshaft, and an indirect gear connection forthe loosely-mounted whirl-frame, substantially as shown and for thepurposes described.

3. In a mixing utensil of the character described, the combination withthe supporting-frame including the pendent portion having a detachablecap-plate, the main shaft 3, the crank-shaft, beveled gearing joiningthe two shafts, and the lower whirl -frame fixdly held on the shaft 3;of an upper whirlframe loosely mounted on the shaft 3 for vertical androtary motion, the hub 11- loosely mounted on the shaft 3, and supportedin the pendent portion of the supporting-frame, the crossed wireconnections 16 that join the hub 11 and the upper Whirl-frame, and abevel-gear connection for joining the hub 11 with the crank-shaft,substantially as shown and described.

4. In an appliance as described, the combination with the shaft 3,having a bevelpinon, the crank-shaft, the latter having a bevel-pinionheld to mesh with the pinion on shaft 3, the hub 11 having a pinion 11for meshing with the crank-shaft pinion, a lower whirl-frame detachablyfitted on the shaft 3 to turn therewith, an upper whirl-frame looselymounted on the shaft 3 and vertically movable thereon, and the crossedspringwires 16 connected at one end to the hub 11", and at the other tothe hub of the upper whirl-frame, all being arranged substantially asshown and for the purposes described.

RICHARD ROBINSON. Witnesses:

WM. EVANS, SEYMOUR DUKE.

